In general, everything is simple: 
Where do they come from and why?
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace testSymbol { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { string s = "D:\\VKR\\SiteParser\\SiteParser\\bin\\Debug\\tes.jpeg"; var t = 0; } } } I download the file like this
wc.DownloadFile ( new Uri("https://mysite.ru" + imagePath),"tes.jpeg" ); 
s.Lengthouts.Length. There are two extra characters in it, exactly they go to?. Where do you get this line? Try not to copy it from somewhere and insert it, but type manually - and there will be no error. - Grundystring s = "D:\\VKR\\SiteParser\\SiteParser\\bin\\Debug\\tes.jpeg";there are already hidden characters in the line. Simply they are whitespace and not displayed, but they are. - Grundy